{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "16fb71be",
   "metadata": {},
   "source": [
    "----------\n",
    "* 记录人：简钰英\n",
    "* 时间：2021-11-25\n",
    "* week13\n",
    "* 主要参考文档:\n",
    "> 1. [Python官方文档](https://python/org)\n",
    "> 2. [gitee课堂笔记](https://gitee.com/xzhichao/python)\n",
    "> 3. [许老师博客](https://cnblogs.com/xuzhichao)\n",
    "\n",
    "----------\n"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "b40b5910",
   "metadata": {},
   "source": [
    "## 1.上周回顾\n",
    "## 1.1Json(文本数据)-->Dict(python中的字典数据)\n",
    "## 1.2字典和列表的综合实践"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d35dbb6d",
   "metadata": {},
   "source": [
    "# 2.本周内容\n",
    "## 2.1 [集合](https://docs.python.org/3/tutorial/datastructures.html#sets)\n",
    "> 1. 集合的性质\n",
    ">> 1. 无序(unordered)\n",
    ">> 2. 不重复(no duplicate)\n",
    "> 2. 集合的一般方法\n",
    ">> 1. 增加\n",
    ">> 2. 删除\n",
    ">> 3. 查询：in 查询成员关系\n",
    "> 3. 集合的数学逻辑运算\n",
    "### 1. 集合的性质及概念\n",
    "> * 思考 ： 我想了解一组数据中有哪些唯一存在的值？（假如是列表）"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "178df236",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[18, 24, 25, 23]"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "no_duplicate_age = []\n",
    "list_age = [18,24,25,24,18,23,18]\n",
    "for i in list_age:\n",
    "    if i not in no_duplicate_age:\n",
    "        no_duplicate_age.append(i)\n",
    "no_duplicate_age"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "d1e737b6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{24, 25, 18, 23}\n"
     ]
    }
   ],
   "source": [
    "# list ---> set 的方法：set() \n",
    "no_duplicate_age_set = set(list_age)\n",
    "print(no_duplicate_age_set)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "e496383f",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'orange', 'banana', 'apple', 'pear'}\n",
      "True\n",
      "False\n"
     ]
    }
   ],
   "source": [
    "# 官方文档测试代码\n",
    "# 1. 移除重复项\n",
    "basket = {'apple', 'orange', 'apple', 'pear', 'orange', 'banana'}\n",
    "print(basket)\n",
    "# 2. in 查询成员关系\n",
    "print('orange' in basket)\n",
    "print('crabgrass' in basket)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9a7ecea2",
   "metadata": {},
   "source": [
    "### 2. 集合的一般方法\n",
    "* 集合的创建的两种一般方法： \n",
    "\n",
    "> 1. set(list)\n",
    "> 2. 直接按照集合的结构创建：{value1,value2,value3,...}  \n",
    "\n",
    "\n",
    "> 1. 增加\n",
    ">> * add() ： Add an element to a set | 注意： This has no effect if the element is already present."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "e44a36b6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 4, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "set_1 = set([1,3,4,0,8,66,7])\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "67b67acb",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function add:\n",
      "\n",
      "add(...) method of builtins.set instance\n",
      "    Add an element to a set.\n",
      "    \n",
      "    This has no effect if the element is already present.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.add)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "b8b2f5ef",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 4, 99, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "set_1.add(99)\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "fd6b4b7b",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 4, 99, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "set_1.add(66)\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "97047425",
   "metadata": {},
   "source": [
    "> 2. 删除\n",
    ">> 1. pop():Remove and return an arbitrary set element.Raises KeyError if the set is empty.\n",
    ">> 2. remove()\n",
    ">> 3. discard()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "ba206725",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 4, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "set_1 = set([1,3,4,0,8,66,7])\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "9f9e50e3",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function pop:\n",
      "\n",
      "pop(...) method of builtins.set instance\n",
      "    Remove and return an arbitrary set element.\n",
      "    Raises KeyError if the set is empty.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.pop)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "9417cee6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 4, 7, 8}\n",
      "{1, 66, 3, 4, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "# 1. Remove and return an arbitrary set element.\n",
    "print(set_1)\n",
    "set_1.pop()\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "d2e64fc8",
   "metadata": {},
   "outputs": [
    {
     "ename": "KeyError",
     "evalue": "'pop from an empty set'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m                                  Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-12-0defeaec728f>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[1;31m# 2. Raises KeyError if the set is empty.\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      2\u001b[0m \u001b[0mset_2\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mset\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 3\u001b[1;33m \u001b[0mset_2\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mpop\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m: 'pop from an empty set'"
     ]
    }
   ],
   "source": [
    "# 2. Raises KeyError if the set is empty.\n",
    "set_2 = set([])\n",
    "set_2.pop()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "65a25420",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function remove:\n",
      "\n",
      "remove(...) method of builtins.set instance\n",
      "    Remove an element from a set; it must be a member.\n",
      "    \n",
      "    If the element is not a member, raise a KeyError.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.remove)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "54d5ffee",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{1, 66, 3, 4, 7, 8}\n",
      "{1, 3, 4, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "# 1. Remove an element from a set; it must be a member.\n",
    "print(set_1)\n",
    "set_1.remove(66)\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "def5b00e",
   "metadata": {},
   "outputs": [
    {
     "ename": "KeyError",
     "evalue": "66",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m                                  Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-15-85fbdeb7befa>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[1;31m# 2. If the element is not a member, raise a KeyError. 一般项目中 remove（）会和 in 共同使用\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 2\u001b[1;33m \u001b[0mset_1\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mremove\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m66\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m: 66"
     ]
    }
   ],
   "source": [
    "# 2. If the element is not a member, raise a KeyError. 一般项目中 remove（）会和 in 共同使用\n",
    "set_1.remove(66)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "86e7c8fd",
   "metadata": {},
   "outputs": [],
   "source": [
    "# * 避免KeyError的方式：\n",
    "if 66 in set_1:\n",
    "    set_1.remove(66)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "e1daf60e",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function discard:\n",
      "\n",
      "discard(...) method of builtins.set instance\n",
      "    Remove an element from a set if it is a member.\n",
      "    \n",
      "    If the element is not a member, do nothing.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.discard)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "b4062301",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{1, 3, 4, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "print(set_1)\n",
    "set_1.discard(66)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "01ebaa75",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function remove:\n",
      "\n",
      "remove(...) method of builtins.set instance\n",
      "    Remove an element from a set; it must be a member.\n",
      "    \n",
      "    If the element is not a member, raise a KeyError.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.remove)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "4398a3c9",
   "metadata": {},
   "source": [
    "### 3.集合的运算\n",
    "> 1. 集合的交集\n",
    "> 2. 集合的并集\n",
    "> 3. 集合的差集"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "81cc674a",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "set_1 = set([1,2,5,6,7,2,3,2,4,4])\n",
    "set_2 = set([1,3,4,0,8,66,7])\n",
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "0f48f813",
   "metadata": {},
   "source": [
    "> 1. 集合的交集\n",
    ">> 1. 使用集合的方法：set_1.intersection(set_2)\n",
    ">> 2. 使用逻辑运算符：set_1 & set_2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "id": "aa3c6de5",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function intersection:\n",
      "\n",
      "intersection(...) method of builtins.set instance\n",
      "    Return the intersection of two sets as a new set.\n",
      "    \n",
      "    (i.e. all elements that are in both sets.)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.intersection)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "id": "c4734c46",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果 :  {1, 3, 4, 7}\n"
     ]
    }
   ],
   "source": [
    "# 使用集合的方法：set_1.intersection(set_2)\n",
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"交集结果 : \",set_1.intersection(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "896ed5f4",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果 :  {1, 3, 4, 7}\n"
     ]
    }
   ],
   "source": [
    "# 使用逻辑运算符：set_1 & set_2\n",
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"交集结果 : \",set_1 & set_2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "909991c8",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 实践：\n",
    "set_1_xu = {\"星期一12-14\",\"星期二3-5\",\"星期二12-14\" }\n",
    "set_2_前端 = {\"星期二3-5\",\"星期二12-14\"}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "1d5895c4",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'星期二3-5', '星期二12-14'}\n",
      "结论：周一班 API课 让给前端的同学~\n"
     ]
    }
   ],
   "source": [
    "print(set_1_xu & set_2_前端)\n",
    "print(\"结论：周一班 API课 让给前端的同学~\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "319a6c7c",
   "metadata": {},
   "source": [
    "> 2. 集合的并集\n",
    ">> 1. 使用并集的方法：set_1.union(set_2)\n",
    ">> 2. 使用逻辑运算符：set_1 | set_2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "38cccb30",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果 :  {0, 1, 2, 3, 4, 5, 6, 7, 66, 8}\n"
     ]
    }
   ],
   "source": [
    "# 1.使用并集的方法：set_1.union(set_2)\n",
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"交集结果 : \",set_1.union(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "id": "b117d542",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果 :  {0, 1, 2, 3, 4, 5, 6, 7, 66, 8}\n"
     ]
    }
   ],
   "source": [
    "# 2. 使用逻辑运算符：set_1 | set_2\n",
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"交集结果 : \",set_1 | set_2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "450b9575",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "开始的时间 :  1638410508.0113666\n",
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果 :  {0, 1, 2, 3, 4, 5, 6, 7, 66, 8}\n",
      "结束的时间 :  1638410508.0143607\n",
      "运行的时间 :  0.002994060516357422\n"
     ]
    }
   ],
   "source": [
    "# 计算运行效率 = 运行后的时间节点 - 运行前的时间节点  : 思考并对比列表运算的执行效率 \n",
    "import time\n",
    "start_time = time.time()\n",
    "print(\"开始的时间 : \",start_time)\n",
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"交集结果 : \",set_1 | set_2)\n",
    "stop_time = time.time()\n",
    "print(\"结束的时间 : \",stop_time)\n",
    "print(\"运行的时间 : \", stop_time - start_time)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2417a2e8",
   "metadata": {},
   "source": [
    "> 3. 集合的差集（考虑先后顺序）\n",
    ">> 1. 使用差集的方法：set_1.difference(set_2)\n",
    ">> 2. 使用逻辑运算符：set_1 - set_2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "id": "7c9428b6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "set_1 和 set_2 差集结果 :  {2, 5, 6}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"set_1 和 set_2 差集结果 : \",set_1.difference(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "id": "92424618",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "set_2 和 set_1 差集结果 :  {0, 8, 66}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"set_2 和 set_1 差集结果 : \",set_2.difference(set_1))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "7cb34e16",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "set_1 和 set_2 差集结果 :  {2, 5, 6}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"set_1 和 set_2 差集结果 : \",set_1 - set_2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "id": "ef41b322",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "set_2 和 set_1 差集结果 :  {0, 8, 66}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"set_2 和 set_1 差集结果 : \",set_2 - set_1)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2c5945a1",
   "metadata": {},
   "source": [
    "> 4. 对称差集\n",
    ">> 1. 用对称差集的方法：set_1.symmetric_difference(set_2)\n",
    ">> 2. 使用逻辑运算符：? (set_1 - set_2) | (set_2-set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "id": "3683fcf7",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function symmetric_difference:\n",
      "\n",
      "symmetric_difference(...) method of builtins.set instance\n",
      "    Return the symmetric difference of two sets as a new set.\n",
      "    \n",
      "    (i.e. all elements that are in exactly one of the sets.)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.symmetric_difference)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "id": "6be69f37",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "对称差集结果 :  {0, 66, 2, 5, 6, 8}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"对称差集结果 : \",set_1.symmetric_difference(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "id": "b28ac56a",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1 :  {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2 :  {0, 1, 66, 3, 4, 7, 8}\n",
      "对称差集结果 :  {0, 2, 66, 5, 6, 8}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1 : \",set_1)\n",
    "print(\"set_2 : \",set_2)\n",
    "print(\"对称差集结果 : \",(set_1 - set_2) | (set_2-set_1))"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "416d9272",
   "metadata": {},
   "source": [
    "### 集合实践：(P129)\n",
    "```\n",
    "vowels = set('aeiou')\n",
    "word = input(\\\"Provide a word to search for vowels:\\\")\n",
    "found = vowels.intersection(set(word))\n",
    "for vowel in found:          \n",
    "   print(vowel)\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "2bf44dd7",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "vowels :  {'u', 'i', 'o', 'a', 'e'}\n"
     ]
    }
   ],
   "source": [
    "vowels = set('aeiou')\n",
    "print(\"vowels : \",vowels)\n",
    "word = input(\"Provide a word to search for vowels:\")\n",
    "print(\"word : \",set(word))\n",
    "found = vowels.intersection(set(word))\n",
    "print(found)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "ef96273d",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "39b59cc0",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.8.8"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}
